A striking number of physically and chemically different systems, including monocrystals, glasses and simple liquids, exhibit similar electrical response behaviour at classical frequencies below THz region. It is a purpose of this seminar to show that these similarities in the response can be linked to the similarities in the blocking nature of the interface between the metal electrode and the particular system under investigation. After a short review of the new electrical response analysis, where the interfaces determine the important boundary conditions, the experimental results on...
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Semináře
Úterý, 09.04.2019 10:00
Petr Viščor (EIS Laboratory, Skjoldenaesvej 17, 4174 Jystrup, Denmark & Semimetrics Ltd., Kings Langley, England)
Pátek, 12.04.2019 09:00 - 11:00
Dr. Stefan Zollner (Academic Department Head and Professor, New Mexico State University, Las Cruces, NM, USA)
Dr. Stefan Zollner will give a series of public lectures on Optical Properties of Solids for the Institute of Physics. The lectures are recorded and placed online including other materials.
Part V covers the following topics: Analytical properties of dielectric function, Kramers-Kronig relations, Sellmeier, poles, Cauchy.
The lectures follow the textbook by Mark Fox “Optical Properties of Solids”, with additional materials by the...
Úterý, 16.04.2019 14:00
Prof. Philippe F. Smet (LumiLab research group, Department of Solid State Sciences, Ghent University, Belgium)
First I will give a brief overview of the current activities in the LumiLab research group at Ghent University related to luminescent materials, highlighting cathodoluminescence spectroscopy in electron microscopy (SEM-CL) and the use of red-emitting Mn4+-doped fluoride phosphors for LED applications.
The main part will deal with a specific class of luminescent materials, namely phosphors which are able to store excitation energy in their lattice, in such a way that the time between excitation and emission can be extended up to minutes, hours or even many thousands of years....
Úterý, 23.04.2019 15:00
Hubert Ebert (Ludwig-Maximilians-Universität München)
Spin-orbit coupling gives rise in magnetic solids to a large number of effects that are at the same time of great scientific as well as technological interest. In fact they often play a central role in modern spintronics concepts and devices. As examples for this, results of investigations based on a fully relativistic Dirac formalism on the magneto-crystalline anisotropy, transport properties and the Gilbert damping parameter will be presented. As it will be demonstrated, a coherent treatment of the magnetic anisotropy can be achieved by including the Breit interaction that gives rise...
Pátek, 26.04.2019 09:00 - 11:00
Dr. Stefan Zollner (Academic Department Head and Professor, New Mexico State University, Las Cruces, NM, USA)
Dr. Stefan Zollner will give a series of public lectures on Optical Properties of Solids for the Institute of Physics. The lectures are recorded and placed online including other materials.
Part VI covers the following topics: Applications of Lorentz...
Pátek, 10.05.2019 09:00 - 11:00
Dr. Stefan Zollner (Academic Department Head and Professor, New Mexico State University, Las Cruces, NM, USA)
Dr. Stefan Zollner will give a series of public lectures on Optical Properties of Solids for the Institute of Physics. The lectures are recorded and placed online including other materials.
Part VII covers the following topics: Electronic band structure, direct and indirect band gaps, Fermi’s Golden Rule.
The lectures follow the textbook by Mark Fox “Optical Properties of Solids”, with additional materials by the instructor to make...
Úterý, 14.05.2019 14:00
Roland Wiesendanger (Interdisciplinary Nanoscience Center Hamburg, University of Hamburg, Germany)
Majorana states in atomic-scale magnet-superconductor hybrid systems have recently become of great interest because they can encode topological qubits and ultimately provide a new direction in topological quantum computation [1,2]. First, it will be demonstrated how well defined 1D atomic chains of magnetic adatoms on superconducting substrates with high spin-orbit coupling can be artificially fabricated using STM-based atom-manipulation techniques. Spin-polarized STM measurements [3] allow to reveal the presence of non-collinear spin textures, i.e. spin spiral ground states, stabilized by...
Pátek, 24.05.2019 09:00 - 11:00
Dr. Stefan Zollner (Academic Department Head and Professor, New Mexico State University, Las Cruces, NM, USA)
Dr. Stefan Zollner will give a series of public lectures on Optical Properties of Solids for the Institute of Physics. The lectures will be recorded and placed online and it will be possible to follow individual lectures.
Part VIII covers the following topics: Free electrons, effective masses in semiconductors, direct-gap absorption, excitons.
The lectures follow the textbook by Mark Fox “Optical Properties of Solids”, with additional materials by the instructor to make the lectures more self-contained, especially for scientists from other disciplines. They...
Pátek, 07.06.2019 09:00 - 11:00
Dr. Stefan Zollner (Academic Department Head and Professor, New Mexico State University, Las Cruces, NM, USA)
Dr. Stefan Zollner will give a series of public lectures on Optical Properties of Solids for the Institute of Physics. The lectures are recorded and placed online including other materials.
Part IX covers the following topics: Interband transitions, van Hove singularities, critical-point lineshapes.
The lectures follow the textbook by Mark Fox “Optical Properties of Solids”, with additional materials by the instructor to make the...
Pátek, 21.06.2019 09:00 - 11:00
Dr. Stefan Zollner (Academic Department Head and Professor, New Mexico State University, Las Cruces, NM, USA)
Dr. Stefan Zollner will give a series of public lectures on Optical Properties of Solids for the Institute of Physics. The lectures are recorded and placed online including other materials.
Part X covers the following topics: Photoluminescence, Einstein coefficients, quantum confinement, quantum wells, wires, and dots.
The lectures follow the textbook by Mark Fox “Optical Properties of Solids”, with additional materials by the...
Stránky
Minulé semináře
| Martin Vacha | Electroluminescence, Stark effect and modulation of photophysics in single halide perovskite nanocrystals | 03.04.2019 10:00 |
| Vojtěch Chlan | Solid state NMR | 28.03.2019 10:00 |
| Martin Adamec | NMR studies of Ba(Fe0.5Nb0.5)O3 and multiferroic Pb(Fe0.5Nb0.5)O3 | 28.03.2019 10:00 |
| Filip Dominec | Chemical sensing and “non-sensing” in nitride heterostructures | 26.03.2019 11:00 |
| Tinkara Troha | Liquid crystalline nanoparticles | 26.03.2019 10:00 |
| Alessandro Barla | Magnetic exchange phenomena mediated by graphene and by topological insulators | 26.03.2019 10:00 |
| Dr. Stefan Zollner | Optical Properties of Solids IV | 22.03.2019 09:00 |
| Oleg Lunov | PHYSICAL CUES AND CELL BEHAVIOUR: CRITICAL OVERVIEW | 20.03.2019 14:00 |
| André Maia | Multiferroic properties of TbMn1–xFexO3 | 12.03.2019 10:00 |
| Dr. Stefan Zollner | Optical Properties of Solids III | 08.03.2019 09:00 |
Stránky
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